About a month ago I noticed [this graffiti](https://i.imgur.com/QfDjmiy.jpeg) next to a door on my block in Finnieston near the Mitchell Library. Two weeks later I noticed [another instance](https://i.imgur.com/RBAPvBZ.jpg), and today a third has appeared.
Now, as a trans person I am not exactly complaining, but I am wondering who is doing this and why, or if anyone else has seen anything similar.